Facebook | Phone Screen | Range Sum Query 2D - Immutable
Anonymous User
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MetaPhone ScreeningInterview

I had phone screen interview with FB recently.
I was asked the following question:

  1. https://leetcode.com/problems/range-sum-query-2d-immutable/ : Most optimal solution was asked (query in O(1) time). Also the wordings of the question was changed a little.
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